Removal of sulfonamide antibiotics from wastewater by gamma irradiation in presence of iron ions  

作　　者：Zhong Wan Jian-Long Wang 

机构地区：[1]Collaborative Innovation Center for Advanced Nuclear Energy Technology, INET, Tsinghua University,Beijing 100084, China [2]Beijing Key Laboratory of Radioactive Waste Treatment,INET, Tsinghua University, Beijing 100084, China

出　　处：《Nuclear Science and Techniques》2016年第5期104-108,共5页核技术（英文）

基　　金：supported by the National Natural Science Foundation of China(No.51338005)

摘　　要：The presence of sulfonamide antibiotics in aquatic environments has received increasing attention in recent years.Sulfadiazine(SD),a widely used heterocyclic sulfonamide pharmaceutical,has entered into the receiving water body.In this paper,gamma rays are used to irradiate samples of sulfadiazine antibiotics-containing wastewater.The results demonstrate that SD can be effectively degraded by irradiation,but the mineralization degree of SD(in terms of TOC) is not as efficient as the SD degradation.The addition of Fe^(2+) can significantly enhance the SD degradation and mineralization through the generation of hydroxyl radical by catalytic decomposition of H_2O_2 from water radiolysis.Ion chromatography analysis indicates that sulfate ions(SO_4^(2-)) and formate(HCOO^-) are the main intermediate products.Gamma irradiation is a promising technology for removing low-concentration antibiotics from water and wastewater.The presence of sulfonamide antibiotics in aquatic environments has received increasing attention in recent years. Sulfadiazine （SD）, a widely used heterocyclic sulfonamide pharmaceutical, has entered into the receiving water body. In this paper, gamma rays are used to irradiate samples of sulfadiazine antibiotics-containing wastewater. The results demonstrate that SD can be effectively degraded by irradiation, but the mineralization degree of SD （in terms of TOC） is not as efficient as the SD degradation. The addition of Fe2？ can significantly enhance the SD degradation and mineralization through the generation of hydroxyl radical by catalytic decomposition of H2O2 from water radiolysis. Ion chromatography analysis indicates that sulfate ions （SO4^2-） and formate （HCOO^-） are the main intermediate products. Gamma irradiation is a promising technology for removing low-concentration antibiotics from water and wastewater.

关 键 词：Γ射线照射 废水样品 抗生素 磺胺类 铁离子 降解效率 离子色谱分析 羟基自由基 

分 类 号：X703[环境科学与工程—环境工程]